Discrete Event Simulation using Kotlin coroutines

A discrete event simulation implemented as a kotlin custom event loop. Unfortunately, not all APIs required to pull it off are stable:

• the EventLoop API is private, which prevents hooking into runBlocking. runSimulation is an equivalent of runBlocking, reconstructed using the public API.
• the Delay API is required to properly hook into the delay function. This API is public, but marked as internal, which requires @OptIn(InternalCoroutinesApi::class).